While it is difficult to imagine how all these physically motivated scenarios,
some of which are quite aspherical in nature, might possibly coexist at all SN
luminosities and yield events that follow quite closely the relation between SN
luminosity and light curve width [1]}, it is also not
unreasonable to expect that they all exist, perhaps in some corner of parameter
space, while the main relation may be due to a single, dominant channel.
